PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/19-16:12:30
G01     234.2          24.1               10.4 +/-    2.29      20.7 +/-    2.29  0.080 / 0.120
G03     301.7          64.8               10.4 +/-    0.49      11.3 +/-    0.49  0.060 / 0.120
G14     76.2           32.4                8.8 +/-    0.94      14.7 +/-    0.94  0.030 / 0.040
G16     153.6          35.4               13.3 +/-    1.09      21.0 +/-    1.09  0.030 / 0.030
G22     238.7          76.3               10.6 +/-    0.64      10.9 +/-    0.64  0.070 / 0.100
G23     301.3          32.8                8.1 +/-    1.17      13.5 +/-    1.17  0.070 / 0.100
G31     42.4           39.8                8.8 +/-    1.14      12.8 +/-    1.14  0.050 / 0.060
G32     92.1           11.1                9.6 +/-    2.39      26.1 +/-    2.39  0.040 / 0.070